package top.xxyu.utils;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import java.util.Vector;
import java.util.regex.Matcher;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;

//import org.slf4j.Logger;
//import org.slf4j.LoggerFactory;

import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.ChannelSftp.LsEntry;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.SftpATTRS;
import com.jcraft.jsch.SftpException;


public class SFTPUtil {


    private ChannelSftp sftp;

    private Session session;
    /** SFTP 登录用户名*/
    private String username;
    /** SFTP 登录密码*/
    private String password;
    /** 私钥 */
    private String privateKey;
    /** SFTP 服务器地址IP地址*/
    private String host;
    /** SFTP 端口*/
    private int port = 22;


    /**
     * 构造基于密码认证的sftp对象
     */
    public SFTPUtil(String username, String password, String host, int port) {
        this.username = username;
        this.password = password;
        this.host = host;
        this.port = port;
    }

    /**
     * 构造基于秘钥认证的sftp对象
     */
    public SFTPUtil(String username, String host, int port, String privateKey) {
        this.username = username;
        this.host = host;
        this.port = port;
        this.privateKey = privateKey;
    }

    /**
     * 构造基于秘钥认证的sftp对象
     */
    public SFTPUtil(String host, String username, String privateKey) {
        this.username = username;
        this.host = host;
        this.privateKey = privateKey;
    }

    public SFTPUtil(){}


    /**
     * 连接sftp服务器
     */
    public void login(){
        try {
            JSch jsch = new JSch();
            if (privateKey != null) {
                jsch.addIdentity(privateKey);// 设置私钥
            }

            session = jsch.getSession(username, host, port);

            if (password != null) {
                session.setPassword(password);
            }
            Properties config = new Properties();
            config.put("StrictHostKeyChecking", "no");
//            session.setConfig("userauth.gssapi-with-mic", "no");
//            session.setConfig("StrictHostKeyChecking", "no");
            session.setConfig(config);
            session.connect();

            Channel channel = session.openChannel("sftp");
            channel.connect();

            sftp = (ChannelSftp) channel;
        } catch (JSchException e) {
            e.printStackTrace();
        }
    }

    /**
     * 关闭连接 server
     */
    public void logout(){
        if (sftp != null) {
            if (sftp.isConnected()) {
                sftp.disconnect();
            }
        }
        if (session != null) {
            if (session.isConnected()) {
                session.disconnect();
            }
        }
    }


    /**
     * 将输入流的数据上传到sftp作为文件。文件完整路径=basePath+directory
     * @param basePath  服务器的基础路径
     * @param directory  上传到该目录
     * @param sftpFileName  sftp端文件名
     * @param input   输入流
     */
    public void upload(String basePath,String directory, String sftpFileName, InputStream input) throws SftpException{
        try {
            sftp.cd(basePath);
            sftp.cd(directory);
        } catch (SftpException e) {
            //目录不存在，则创建文件夹
            String [] dirs=directory.split(Matcher.quoteReplacement("\\"));
            String tempPath=basePath;
            for(String dir:dirs){
                if(null== dir || "".equals(dir)) continue;
                tempPath+="/"+dir;
                try{
                    sftp.cd(tempPath);
                }catch(SftpException ex){
                    sftp.mkdir(tempPath);
                    sftp.cd(tempPath);
                }
            }
        }
        sftp.put(input, sftpFileName);  //上传文件
    }


    /**
     * 下载文件。
     * @param directory 下载目录
     * @param downloadFile 下载的文件
     * @param saveFile 存在本地的路径
     */
    public void download(String directory, String downloadFile, String saveFile) throws SftpException, FileNotFoundException{
        if (directory != null && !"".equals(directory)) {
            sftp.cd(directory);
        }
        File file = new File(saveFile);
        sftp.get(downloadFile, new FileOutputStream(file));
    }

    /**
     * 下载文件
     * @param directory 下载目录
     * @param downloadFile 下载的文件名
     * @return 字节数组
     */
    public byte[] download(String directory, String downloadFile) throws SftpException, IOException{
        if (directory != null && !"".equals(directory)) {
            sftp.cd(directory);
        }
        InputStream is = sftp.get(downloadFile);

        byte[] fileData = toByteArray(is);

        return fileData;
    }

    private static byte[] toByteArray(InputStream input) throws IOException {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        byte[] buffer = new byte[4096];
        int n = 0;
        while (-1 != (n = input.read(buffer))) {
            output.write(buffer, 0, n);
        }
        return output.toByteArray();
    }
    /**
     * 删除文件
     * @param directory 要删除文件所在目录
     * @param deleteFile 要删除的文件
     */
    public void delete(String directory, String deleteFile) throws SftpException{
        sftp.cd(directory);
        sftp.rm(deleteFile);
    }


    /**
     * 列出目录下的文件
     * @param directory 要列出的目录
     */
    public Vector<?> listFiles(String directory) throws SftpException {
        return sftp.ls(directory);
    }

    //上传文件测试
    public static void main(String[] args) throws SftpException, IOException, DocumentException {
        SFTPUtil sftp = new SFTPUtil("test", "test123", "localhost", 22);
        sftp.login();
        File file = new File("C:\\Users\\35725\\Downloads\\shujujiegouJavajhkj_jb51\\数据结构和Java集合框架.pdf");
        InputStream is = new FileInputStream(file);

        sftp.upload("/sftp_dir","/upload", "2.pdf", is);
//        System.out.println(sftp.listFiles("/data_export/test"));
//        Vector<?> files = sftp.listFiles("/data_export/test");
//        for(Object f:files){
//        	LsEntry entry = (LsEntry)f;
//        	System.out.println(entry.getFilename());
//        	System.out.println(entry.getLongname());
//        	SftpATTRS atts = entry.getAttrs();
//
//        }


//        File file = new File("C:\\Documents and Settings\\huangyuchi\\Desktop\\00CHS\\jdk1.6.zip");
//      InputStream is = new FileInputStream(file);
//      sftp.upload("/data_export", "/test", "jdk1.6.zip", is);











////        byte[] bs = sftp.download("/data_export/CHSFileExchange", "将字符串.xml");
//        byte[] bs = sftp.download("/data_export/CHSFileExchange", "将字符串.xml");
//        sftp.download("/data_export/CHSFileExchange", "将字符串.xml" ,"D://将字符串.xml");
//        System.out.println(new String(bs,"utf-8"));
//        String result = "";
//        Document document = DocumentHelper.parseText(new String(bs,"utf-8")); // 将字符串转为XML
//		String status = document.getRootElement().element("message").element("status").getText();
//		String errors = document.getRootElement().element("message").element("errors").getText();
//		String reviewStatus = document.getRootElement().element("message").element("ReviewStatus").getText();
//		if(status.equals("successful") && !"NO".equals(reviewStatus)){
//			result = status;//lca成功，预审签成功
//		}else if(status.equals("successful") && "NO".equals(reviewStatus)){
//			//lca成功，预审签失败
//			result = status+" "+errors+" "+reviewStatus;
//		}else{
//			//全部失败
//			result = status+" "+errors;
//		}
//		System.out.println("result is " + result);
        sftp.logout();
    }
}
